<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <style>
     
        ul{
            list-style: none;
            position: relative;
            width: 500px;
            height: 500px;
            border: 2px solid rebeccapurple;
            display: flex;
        
        }

        ul li:not(:nth-child(7)){
            opacity: 0;
        }
        ul:hover li{
            opacity: 1;
        }

        li{
            height: 200px;
            width: 50px;
            position: absolute;
            left: 50%;
            bottom: 30px;
            text-align: center;
            transform-origin: bottom center;
            color: white;
            border-radius: 10px ;
            transition: all 2s;
            /* box-shadow: 0px 0px 10px  black inset; */
        
           
        }


        li:nth-child(1), li:nth-child(13){
            background-color: rebeccapurple;
        }
        li:nth-child(2), li:nth-child(12){
            background-color: greenyellow;
        }
        li:nth-child(3), li:nth-child(11){
            background-color: royalblue;
        }
        li:nth-child(4), li:nth-child(10){
            background-color: green;
        }
        li:nth-child(5), li:nth-child(9){
            background-color: yellow;
        }
        li:nth-child(6), li:nth-child(8){
            background-color: yellowgreen;
        }
        li:nth-child(7){
            background: red;
        }

       ul:hover li:nth-child(1){
            transform: rotate(90deg);
        }
        ul:hover li:nth-child(13){
            transform: rotate(-90deg);
        }
        ul:hover li:nth-child(2){
            transform: rotate(75deg);
        }
        ul:hover li:nth-child(12){
            transform: rotate(-75deg);
        }
        ul:hover li:nth-child(3){
            transform: rotate(60deg);
        }
        ul:hover  li:nth-child(11){
            transform: rotate(-60deg);
        }
        ul:hover  li:nth-child(4){
            transform: rotate(45deg);
        }
        ul:hover li:nth-child(10){
            transform: rotate(-45deg);
        }
        ul:hover li:nth-child(5){
            transform: rotate(30deg);
        }
        ul:hover  li:nth-child(9){
            transform: rotate(-30deg);
        }
        ul:hover li:nth-child(6){
            transform: rotate(15deg);
        }
        ul:hover li:nth-child(8){
            transform: rotate(-15deg);
        }

    </style>

</head>
<body>
    

    <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
        <li>5</li>
        <li>6</li>
        <li>7</li>
        <li>8</li>
        <li>9</li>
        <li>10</li>
        <li>11</li>
        <li>12</li>
        <li>13</li>
    </ul>

       

</body>
</html>